Bay-class icebreaking tug

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This article is about a class of icebreaking tugboats in the United States Coast Guard. For radio station WTGB, see WTGB.
Coast Guard cutter Thunder Bay.JPG
The U.S. Coast Guard Cutter Thunder Bay (WTGB-108) clears a channel for vessels to navigate the frozen Hudson River
Class overview
Name: Bay class icebreaking tug
Builders: Tacoma Boatbuilding Company & Bay City Marine
Operators: United States Coast Guard
Preceded by: WYTM 110
In commission: 1979-present
Completed: 9
Active: 9
Retired: 0
General characteristics
Type: Icebreaker
Displacement: 662 tons
Length: 42.7 m (140 ft)
Beam: 11.4 m (37 ft 5 in)
Draught: 3.8 m (12 ft 6 in)
Propulsion: diesel electric: 2 Fairbanks Morse diesel engines with Westinghouse DC generators, 1 Westinghouse DC motor
Speed: 14.7 knots (27.2 km/h)
  • 1,500 nautical miles (2,800 km) at 14.7 knots (27.2 km/h)
  • 3,500 nautical miles (6,500 km) at 12 knots (22 km/h)
  • 6,000 nautical miles (11,000 km) at 10 knots (19 km/h)
Complement: 17 (3 officers)
Armament: 2 × M240 machine guns

The USCG Bay-class icebreaking tug is a class of 140-foot (43 m) icebreaking tugs of the United States Coast Guard, with hull numbers WTGB 101 through to WTGB 109.

They can proceed through fresh water ice up to 20 inches (51 cm) thick, and break ice up to 3 feet (0.91 m) thick, through ramming. These vessels are equipped with a system to lubricate their progress through the ice, by bubbling air through the hull.

President George Herbert Walker Bush tours Katmai Bay (WTGB 101) with commanding officer Coast Guard lieutenant Sandra L. Stosz in 1990.


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